摘要
用热膨胀仪（Ｄｉｌａｔｏｍｅｔｅｒ）、热综合分析仪（Ｔｇ－ＤＴＡ）、Ｘ射线衍射仪（ＸＲＤ）对ＴｅＯ＿２单晶的热膨胀行为进行了实验研究。首次报道了用顶杆法测定３７０～５００℃、沿α和ｃ轴向的ＴｅＯ＿２单晶热膨胀系数α＿α和α＿ｃ；用Ｔｇ－ＤＴＡ法测定ＴｅＯ＿２的熔点并对其热膨胀系数和熔点的关系作了讨论；还从ＴｅＯ＿２单晶的晶体结构和解理特性以及α轴和ｃ轴的化学键键强比较对其热膨胀的各向异性行为作了进一步探讨。
In this paper,the thermal expansion behaviour of the TeO_2 single erystal isstudied experimentally by the push-rod dilatometery Tg-DTA and X-Ray diffrac-tion methods.It is the first time to measure the thermal expension coefficient ofthe TeO_2 single crystal along a and c axes in the temperature region of 370～500℃by the push-rod dilatometer method.Furthermore,the anisotropy of the thermalexpansion of the TeO_2 single crystal is studied according to the structure and thecharacteristic of cleavage as well as the comparison of the chemical bonding stre-ngth of a and c axes.
出处
《应用科学学报》
CAS
CSCD
1994年第2期95-100,共6页
Journal of Applied Sciences
基金
国家自然科学基金
关键词
单晶
热膨胀
晶体结构
熔点
氧化碲
TeO_2 single crystal,thermal expansion,crystal structure,melting point.
